CN217749365U

CN217749365U - Spindle assembly

Info

Publication number: CN217749365U
Application number: CN202221874635.0U
Authority: CN
Inventors: 任东; 潘卫国; 陈锦杰
Original assignee: Nantong Guosheng Intelligence Technology Group Co ltd
Current assignee: Nantong Guosheng Intelligence Technology Group Co ltd
Priority date: 2022-07-19
Filing date: 2022-07-19
Publication date: 2022-11-08
Anticipated expiration: 2032-07-19

Abstract

The utility model discloses a machining center's main shaft assembly. The spindle assembly includes: the spindle box, the spindle, the fixing component, the vibration sensor and the controller are arranged on the fixing component and used for detecting a vibration value generated by the spindle, the controller is electrically connected with the vibration sensor and used for adjusting the rotation state of the spindle according to a shutdown threshold value of a machining center spindle component and the vibration value. When the vibration value detected by the vibration sensor is larger than the shutdown threshold value, the controller can control the whole spindle assembly to shut down, and the spindle assembly of the machining center is prevented from continuing to work after the spindle assembly generates tool collision, so that the spindle assembly is prevented from being damaged.

Description

Spindle assembly

Technical Field

The utility model relates to the field of machining, especially, relate to a main shaft assembly.

Background

The existing machining center spindle assembly does not have an anti-collision function, and when the existing machining center spindle assembly is used, if a use error or a program error occurs, a cutter collision is easy to generate. The bumping cutter means that the cutting amount of the cutter is too large, and the cutter rod bumps into a workpiece besides a cutting edge. The striker is very likely to damage the spindle assembly. Moreover, for equipment manufacturers, since the detection of the working conditions of customers cannot be implemented, responsibility cannot be timely determined when the problem of spindle damage is dealt with afterwards.

SUMMERY OF THE UTILITY MODEL

An aspect of an embodiment of the present application provides a spindle assembly of a machining center, to give an alarm when a tool impact is generated during operation of the spindle assembly, including: a main spindle box; the mandrel is rotationally arranged on the spindle box and used for clamping a cutter; the fixing assembly is arranged on the spindle box and used for fixing the spindle; the vibration sensor is arranged on the fixed component and used for detecting a vibration value generated by the mandrel; the controller is electrically connected with the vibration sensor and adjusts the rotation state of the mandrel according to the shutdown threshold value of the machining center spindle assembly and the vibration value.

In some embodiments, the securing assembly comprises: the spindle outer sleeve is arranged on the spindle box, and the spindle outer sleeve is sleeved on the spindle.

In some embodiments, the securing assembly further comprises: the bearing rotates set up in the main shaft overcoat, the bearing with the dabber interference connection, vibration sensor with the bearing is adjacent.

In some embodiments, further comprising a power assembly, the power assembly comprising: the motor is arranged on the spindle box; the side of the mandrel, which is far away from the bearing, and the output end of the motor are both provided with a driving belt wheel; a belt disposed between the driving pulleys.

In some embodiments, the vibration sensor is attached to the spindle housing.

In some embodiments, a side of the mandrel near the bearing is provided with a cutter for cutting.

In some embodiments, a unclamping cylinder is arranged on the spindle box and used for assisting the cutter to be separated from the spindle.

In some embodiments, the unclamping cylinder is disposed coaxially with the mandrel.

In some embodiments, further comprising: the alarm is arranged on the spindle box, the alarm is electrically connected with the controller, and the alarm is used for giving an alarm when the vibration value is larger than the shutdown threshold value.

In some embodiments, a mounting portion is disposed in the spindle box, and a mounting groove is disposed in the mounting portion for accommodating the fixing assembly.

This application passes through the vibration value that vibration sensor real-time detection dabber produced to be provided with the shutdown threshold value to main shaft assembly, when the vibration value that vibration sensor detected was greater than the shutdown threshold value, the controller just can control whole main shaft assembly and shut down, prevents that machining center's main shaft assembly from producing and still continuing work after hitting the sword, thereby leads to main shaft assembly to receive the damage.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

FIG. 1 illustrates a schematic structural view of a spindle assembly according to an embodiment of the present application;

FIG. 2 is a schematic view of another embodiment of the spindle assembly of the present application shown in FIG. 1;

FIG. 3 is a schematic view of a spindle assembly according to the embodiment of FIG. 1.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first", "second", etc. are used hereinafter for descriptive purposes only and are not to be construed as indicating or implying relative importance or as implying a number of the indicated technical features. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the described features.

The words used in this specification are words of description used in describing embodiments of the invention, but are not intended to limit the invention. It is also to be understood that, unless otherwise expressly stated or limited, the terms "disposed," "connected," and "connected" are intended to be open-ended, i.e., may be fixedly connected, detachably connected, or integrally connected; they may be mechanically coupled, directly coupled, indirectly coupled through intervening media, or may be interconnected between two elements. The above-mentioned meaning belonging to the present invention is specifically understood by those skilled in the art.

The existing machining center spindle assembly does not have an anti-collision function, and when the existing machining center spindle assembly is used, if errors occur in use or programs, a cutter collision is easy to occur. The tool bumping refers to the phenomenon that the cutting amount of the tool is too large, and the tool bar bumps into a workpiece besides a cutting edge. The striker is very likely to damage the spindle assembly. Moreover, for equipment manufacturers, since the detection of the working conditions of customers cannot be implemented, responsibility cannot be timely determined when the problem of spindle damage is dealt with afterwards.

The present application describes a spindle assembly for a machining center to provide an alarm when a tool strike occurs while the spindle assembly 10 is in operation. The machining center is one of numerical control machine tools, is provided with a tool magazine, has an automatic tool changing function, and can perform multi-process machining after a workpiece is clamped once. The machining center is a highly electromechanical integrated product, and different cutters are automatically selected and replaced by programs in the machining process. The machining center can also have various machining fixing cycles, automatic compensation of the radius of the cutter and automatic compensation of the length of the cutter.

The spindle assembly 10 is one of indispensable parts for forming movement of a machining center, and the spindle part of the machining center is required to have high running accuracy, long accuracy retention, and accuracy stability for long-term running. The main shaft assembly 10 primarily functions to support the transmission and transmit torque. During operation, the workpiece is driven directly into surface forming motion by the spindle assembly 10, while the correct relative position of the workpiece to the other components of the machining center is ensured by the spindle assembly.

Referring to fig. 1, fig. 1 discloses a schematic structural diagram of a spindle assembly 10 according to an embodiment of the present application. A spindle assembly 10 of a machining center may include: the spindle head comprises a spindle head 100, a spindle 200 rotatably arranged on one side of the spindle head 100 and used for clamping a tool, a fixing assembly 300 arranged on one side of the spindle head 100 and used for fixing the spindle 200, a vibration sensor 400 arranged on the fixing assembly 300 and used for detecting vibration generated by rotation of the spindle 200, a controller 500 electrically connected with the vibration sensor 400, a power assembly 600 connected to the other side of the spindle head 100 and used for providing power for the spindle 200, an alarm 700 connected to the outer side of the spindle head 100 and used for giving an alarm when the spindle generates a cutter collision, and a tool 800 connected to one end of the spindle 200 and used for cutting a workpiece. The controller 500 may adjust the rotation state of the spindle 200 according to the shutdown threshold and the vibration value of the machining center spindle assembly 10.

Referring to fig. 2, fig. 2 discloses another structural schematic diagram of the spindle assembly 10 according to the embodiment shown in fig. 1. In one embodiment, the headstock 100 may include a first housing 101, a second housing 102 coupled to the first housing 101, and a mounting portion 103 provided on an inner wall of the first housing 101. Both the first casing 101 and the second casing 102 may be made of gray cast iron, nodular cast iron or other suitable materials, which are not limited herein. The first casing 101 may be used for mounting the main components of the spindle assembly 10 such as the spindle 200. The shape of the first casing 101 may be substantially a cube, and may also be a rectangular parallelepiped or other shapes, which are not limited herein.

In one embodiment, the second housing 102 may be used to secure the entire spindle assembly 10. The second box 102 may be connected to the machining center by screws, or may be connected and fixed to the machining center by other connection methods, for example, welding, adhering, inserting, and clamping, which are not limited herein. The first casing 101 and the second casing 102 may be connected together by welding, bonding, or the like.

In an embodiment, the mounting portion 103 may be square or cylindrical, and is not limited herein. The mounting portion 103 may have a mounting groove formed therein for mounting the fixing member 300.

In an embodiment, the mandrel 200 may be made of 45 carbon steel, 40Cr alloy steel, 30 carbon steel, Q255 carbon steel, or other suitable materials, which are not limited herein. The mandrel 200 may be used to hold the tool 800 and different tools 800 may be replaced in different processes. The mandrel 200 may rotate the tool 800 to machine a workpiece.

In one embodiment, the spindle 200 may extend through the headstock 100, i.e., both ends of the spindle 200 may extend through the headstock 100. In another embodiment, the side of the spindle 200 away from the tool 800 may be rotatably coupled to the inner wall of the headstock 100, and the side of the spindle 200 away from the tool 800 does not pass through the headstock 100. In one embodiment, the spindle 200 may be coupled to the headstock 100 by a retaining assembly 300.

In one embodiment, the fixing assembly 300 may have one and is disposed on one side of the mandrel 200 near the cutter 800. In another embodiment, the fixing assembly 300 may be provided with two or three. The fixing assembly 300 may be disposed on a side of the mandrel 200 away from the cutter 800, and the fixing assembly 300 may also be disposed in the middle of the mandrel 200, which is not particularly limited herein.

In one embodiment, the fixing assembly 300 may include: a main shaft outer sleeve 301 connected to the mounting groove and a bearing 302 rotatably arranged on the main shaft outer sleeve 301 and connected with the mandrel 200 in an interference manner. The spindle housing 301 may have a cylindrical structure. Spindle 200 is rotatably disposed within spindle housing 301 by bearing 302.

In one embodiment, vibration sensor 400 may be disposed on spindle housing 301. Since bearing 302 is in direct contact with mandrel 200, placing vibration sensor 400 on spindle jacket 301 better detects the vibrations generated by mandrel 200. In another embodiment, the vibration sensor 400 may be disposed on the mounting portion 103 or an inner wall of the first casing 101, which is not particularly limited herein. The vibration sensor 400 may be an inductive vibration sensor, an eddy current vibration sensor, a capacitive vibration sensor, a resistance strain vibration sensor, a piezoelectric vibration acceleration sensor, or the like, and is not limited herein.

In one embodiment, controller 500 may be mounted outside headstock 100. In another embodiment, the controller 500 may also be installed on other parts of the machining center, and is not limited herein. The controller 500 may receive the vibration value transmitted from the vibration sensor 400 and compare the vibration value with the shutdown threshold in real time. When the vibration value is greater than or equal to the shutdown threshold, it indicates that the vibration generated by the mandrel 200 exceeds the allowable vibration range. Accordingly, the controller 500 signals the power assembly 600 to shut down the power assembly 600 so that the spindle 200 does not continue to rotate. Therefore, abnormal damage of the application caused by the fact that the customer does not specify the operation can be reduced.

Specifically, when the equipment manufacturer performs a maximum cut test on machining center spindle assembly 10 at the factory, controller 500 records the maximum vibration value detected by vibration sensor 400 and uses the 80% value of the maximum vibration value as the shutdown threshold. When the customer uses the machining center spindle assembly 10, once the vibration amount reaching the shutdown threshold value occurs, the machining center spindle assembly 10 stops working, and the spindle assembly 10 is prevented from being damaged. Simultaneously, the vibration value is recorded, so that the accident reason can be conveniently checked in the later period. The method is convenient for analyzing the reason of equipment failure, particularly the damage failure of the main shaft, and judging accident responsibility in the later period.

Referring to fig. 3, fig. 3 is a schematic view of another structure of the spindle assembly 10 according to the embodiment shown in fig. 1. In one embodiment, power assembly 600 may include: a motor 601 arranged on the headstock 100, a driving pulley 602 arranged on one side of the spindle 200 and the output end of the motor 601, and a belt 603 arranged between the two driving pulleys 602.

In an embodiment, the motor 601 may be disposed inside the first casing 101, or may be disposed outside the first casing 101, which is not limited herein. The motor 601 may be a spindle motor 601, a servo motor 601, a reduction motor 601, or other suitable motors 601. The motor 601 may be connected to the headstock 100 by a screw, or may be connected and fixed to the headstock 100 by other connection methods, such as welding, bonding, and clamping.

In one embodiment, the alarm 700 may be electrically connected to the controller 500. The alarm 700 may be a single warning light, an acousto-optic integrated warning light, a combined warning light, or the like, and is not limited herein. The alarm 700 may be disposed outside the headstock 100. The alarm 700 may be connected to the headstock 100 by screws, or may be connected and fixed to the headstock 100 by other connection methods, such as welding, bonding, and clamping.

Specifically, the vibration sensor 400 may detect a vibration value generated by the mandrel 200 and transmit the vibration value to the controller 500 in real time. Then, the controller 500 compares the vibration value with the shutdown threshold of the present application, and when the vibration value is greater than the shutdown threshold, the motor 601 is shutdown. Meanwhile, the controller 500 can send a signal to the alarm 700, and the alarm 700 can send an alarm to the outside after receiving the signal to remind a worker that the spindle assembly 10 of the machining center is abnormal and the spindle assembly 10 needs to be checked.

In one embodiment, the mandrel 200 may be provided with an automatic clamping device on a side thereof adjacent to the cutter 800. The cutter 800 may be fixed to the mandrel 200 by an automatic clamping device, and the cutter 800 may be replaced by the automatic clamping device. The cutter 800 may be a high-speed steel cutter 800, or may be a cemented carbide cutter 800, a diamond cutter 800, a ceramic cutter 800, or the like, which is not limited herein. The tool 800 may be a turning tool, a planer tool, a milling tool, an outer surface broach, a file, or the like.

In an embodiment, a spindle assembly 10 of a machining center may further include: and a unclamping cylinder 900 provided on the headstock 100. The unclamping cylinder 900 is disposed coaxially with the mandrel 200 and is used to assist the tool 800 in disengaging the mandrel 200. The unclamping cylinder 900 may be screwed to the headstock 100, or may be fixed to the headstock 100 by other connection methods, such as welding, bonding, or clamping.

Specifically, the unclamping cylinder 900 is a force-increasing gas-liquid conversion device, and the unclamping cylinder 900 can compress air to act on a cylinder piston to generate thrust to push the cylinder piston, so that oil pressure which is several times higher than the compressed air acts on a compression bar to generate thrust, thereby realizing the action of a mechanical device. The unclamping cylinder 900 can help to lower and upper tool shanks. The knife beating cylinder 900 clamps the knife head through the pulling cylinder when the knife handle is arranged, and the knife head is loosened through a blowing mode when the knife handle is arranged, so that the knife can be conveniently changed.

In the description of the present application, the description of the terms "one embodiment," "another embodiment," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above embodiments are merely examples and are not intended to limit the scope of the present disclosure, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present disclosure or those directly or indirectly applied to other related technical fields are intended to be included in the scope of the present disclosure.

Claims

1. A spindle assembly of a machining center, comprising:

a main spindle box;

the spindle is rotatably arranged on the spindle box and used for clamping a cutter;

the fixing component is arranged on the spindle box and used for fixing the spindle;

the vibration sensor is arranged on the fixed component and used for detecting a vibration value generated by the mandrel;

and the controller is electrically connected with the vibration sensor and adjusts the rotation state of the mandrel according to the shutdown threshold value of the spindle assembly and the vibration value.

2. The spindle assembly of a machining center of claim 1, wherein the securing assembly comprises:

the spindle outer sleeve is arranged on the spindle box and sleeved on the spindle.

3. The spindle assembly of a machining center of claim 2, wherein the fixture assembly further comprises:

the bearing rotates set up in the main shaft overcoat, the bearing with the dabber interference is connected, vibration sensor with the bearing is adjacent.

4. The spindle assembly of a machining center of claim 3, further comprising a power assembly, the power assembly comprising:

the motor is arranged on the spindle box;

the side of the mandrel, which is far away from the bearing, and the output end of the motor are both provided with a driving belt wheel;

a belt disposed between the driving pulleys.

5. The machining center spindle assembly of claim 2, wherein the vibration sensor is attached to the spindle housing.

6. The spindle assembly of a machining center according to claim 3, wherein a side of the spindle close to the bearing is provided with a tool for performing cutting work.

7. The spindle assembly of a machining center according to claim 6, wherein a unclamping cylinder is provided on the headstock for assisting in disengaging the tool from the spindle.

8. The machining center spindle assembly of claim 7, wherein the unclamping cylinder is disposed coaxially with the mandrel.

9. The spindle assembly of a machining center of claim 1, further comprising:

the alarm is arranged on the spindle box, the alarm is electrically connected with the controller, and the alarm is used for giving an alarm when the vibration value is larger than the shutdown threshold value.

10. The spindle assembly of a machining center according to claim 1, wherein a mounting portion is provided in the spindle box, and a mounting groove is provided in the mounting portion for receiving the fixing assembly.